[typing] Log if we observe a precision with a value of zero

lib/debezium/schema.go

@@ -61,8 +61,12 @@ type Field struct {
 	Parameters   map[string]any        `json:"parameters"`
 }
 
+func (f Field) Scale() (int32, error) {
+	return maputil.GetInt32FromMap(f.Parameters, "scale")
+}
+
 func (f Field) GetScaleAndPrecision() (int32, *int32, error) {
-	scale, scaleErr := maputil.GetInt32FromMap(f.Parameters, "scale")
+	scale, scaleErr := f.Scale()
 	if scaleErr != nil {
 		return 0, nil, scaleErr
 	}

lib/typing/decimal/details.go

@@ -2,6 +2,7 @@ package decimal
 
 import (
 	"fmt"
+	"log/slog"
 )
 
 const (
@@ -17,6 +18,13 @@ type Details struct {
 }
 
 func NewDetails(precision int32, scale int32) Details {
+	if precision == 0 {
+		// MySQL, PostgreSQL, and SQLServer do not allow a zero precision, so this should never happen.
+		// Let's log if we observe it happening, and if we don't see it in the logs then we can use zero as the
+		// [PrecisionNotSpecified] value and change precision to a uint16.
+		slog.Error("Decimal precision is zero")
+	}
+
 	if scale > precision && precision != PrecisionNotSpecified {
 		// Note: -1 precision means it's not specified.